Lock.



A.AREN&

LOOK.

APPPIGATION FILED JUNE 1, 1912. Q

- Patented Nov. 5, 1912.

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LOOK.

APPLICATION FILED JUNE 1, 1912.

1,043,750. I Patefited Nov. 5, 1912.

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1,043,750. Y Patented Nov. 5, 1912.

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W 1: Ho e1 8 UNITED STATES PATENT OFFICE,

AUGUST 11mins, ordnnw BRITAIN, commcrrco'r, Assmn'on. To imnnican m1)- wnnn CORPORATION, on NEW BRITAIN, commo'rrcur, A CORPORATION 01 coN- LOCK.

New Britain, county of Hartford, State'of.

Connecticut, have invented certain new and useful Improvements in Locks, of which the following is a full, clear, and exact description.

My invention relates to an improvement in locks, particularly of the type disclosed in United States Letters Patent No. 834,994, the present invention including, of course, changes in structure whereby improved results are attained and whereby the lock is" made of particular service in connection with corridor doors for hotel apartments and the like.

' So far as the present construction embodies features in common with the aforesaid patent, it is unnecessary to describe the same at length, but only in so far as necessary to give a general idea.

Among the main objects .ofthe present invention are. to provide means whereby the occupant of an apartment in a hotel or.other building may securely lock the corridor door from the inside by turning a small knob or so-called thumb-turn, and may instantly unlock the door by simply turning the inside knob, which act of itself not only withdraws the latch in the usual manner, but also casts off the dogging device operated by the thumb-turn. Thus, when it "is desired to make a hasty exit, as in case of fire, the occupant may instantly leave the room with out the embarrassment of casting 0d the' lock by a separate act. 1

I also provide automatic means for pre-' venting the throwing on of the latch dog when the door is open, since it is obvious that should the door be open and should the latch be dogged against being pressed back, there would be danger of injury to the lock in the event the door should be slammed, inasmuch as the latch would hit against the strike-plate and would not move back.

I thirdly provide an improved indicating means in combination with the other elements, which is operated by the mere act of dead-locking the door to indicate that the room is occupied, a matter of greatconvenience when the invention is applied to Specification of Letters Patent.

hotel bedroom Patented Nov. 5, 1912.

Application filed June 1, 1912. Serial no. 700,915.

doors whichllead into the main corridor.

by the mechanic-skilled in the art, from a reading of the following description and an examination of the accompanying drawings, in' which-- of the lock assembled, the usual e'scutcheons, however, being absent. 3 Fig. 2 is a view .of the under side of the parts shown inFig". Fig. 3 is a View similar to Fig.- 2, but 1nverted,.some of the parts being broken away and other parts removed. Fig. 4 is a 'side elevation of the parts as shownin Fig. .3, looking from right to left. Figs. 5, 6 and 7 are detail views. Fig. 8 illustrates another detail in two positions. a front end elevation of the lock, with parts broken away. Fig. 10 is a section on approximately the line az-w of Fig. 2, looking from right to left. Fig. 11 is a plan view showing certain parts. Figs. 12, 13 and 14: are detail views of roll-backs. Fig. 15 is a axis of the knob spindles.

a The present lock is of the so-called unit type, in which 1 constitutes a frame or backparts, including the knobs, are mounted, so that the entire lock may be assembled 'at the factory and applied with the greatest ease to a door. As before stated, the usual 'escutcheons are omitted, as their construction and application are well understood in this type of lock. Y 1

2 represents the outside kno 3 is a key which is insertible into the outer knob for the purpose of operating a roll-back spindle 4, which is connected with what I will term a key-controlled rollback 5. I I

6 is a roll-back mounted upon the shank of the knob 2 and operable by the turning of the outer knob 2. v

7 is a roll-back which is operable by an inner knob 8, said knob beingconnected to the roll-back 7 in any well known manner.

9 is a rotatable sleeve sometimes provided forrthe pur ose of shifting the roll-back 6 longitudina 1y upon the shank of the knob 2. When this sleeve 9 is turned, it operates a plunger 10, which is operatively connected These andother advantages will be seen Figure 1 is a plan view of the main frame Fig. 9 isbone upon which all of the various lock central longitudinal section through the through the roll-backs 5 and 7 with the roll-back 6, so that the latter can be moved either into the position shown in Fig; 1, in which it engages in a notch in-the frame 1, whereby it cannot be turned, or may be moved to the left and close to the roll-back5 so as to disengage it from the frame, thus enabling it to be turned, which latter positionis indicated in dotted lines Fig. 15. This means is a x ell known means for locking the outer knob against turning, and thereby making it impossible to gain accem from the exterior without the use of a suitable key such as 3, by which key the rollback 5 may be 0 erated independently of the knob 2. All 0? operative engagement with the bifurcated tail end 11 of a latch slide 12, which latter is connected to the latch 13, a spring 14 being provided to normally project the latch 13.

15 is a tilting frame which operates generally in the manner described in the aforesaid Letters Patent. This frame 15 is provided with a latch dogging arm 16, which is arranged to stand back of the latch 13 when the door is closed. The frame also has a cam arm 17, which is arranged to be engaged by an operating shoulder 18 on the tail piece 33 of a pivoted dog operator 19,

which presents a bevel at the face of the lock corresponding in general appearance to a latch. When the door is closed, this operator 19 is pressed back by the strikeplate (not shown). When the door is open, it is projected. When the operator 19 is projected, the tilting frame 15 and its several arms stand as shown in Fig. 10. lVh en the operator 19 is pushed in,.the shoulder 18 leaves the incline 17, so that the frame 15 may be tilted on its pivot through the action of a spring 20 to swing the arm 16' into position to act as a stop for the latch. A cam shoulder 21 on the tail of the latch slide operates against an inclined tail end 22 of the frame, so that when the latch is retracted the very first movement of the latch slide will be to rock the frame 15 and move the dogging arm 16 away from the latch 13. V

23 is a handle or thumb-turn carrying a spindle 24. This spindle 24 enters the hub of a dogging arm 25, which may be swung into the oil position shown in Fig. 10, or may be turned down so that its front end will stand directly to the rear of the latch bolt, so as to squarely block or dead-lock the same. Obviously, by turning the thumbturn 23 in either directlon, this dogging device 25 may be operated, but it is important that means shouldbe' provided so that when the door is closed and deadlocked by this thumb-turn and dogging device 25, it would still be possible for the occupant of a room to make his escape therefrom, in the event these roll-backs make an of danger, by simplyturning the inner lmob 8. Accordingly have provided a slide 27 suitably guided upon the frame 1 to move back and forth.

The hub of the dogging arm 25 is rovided with an cfiset 28, which takes into a notch 27 in the slide 27, whereby the movement of the slides to and fro will also operate the dog 25. The slide 27 is provided with a bifurcated rear end, which straddles the hub of the frame through which the knob spindles pass, and each end is also provided with a forward hooked extension 29 29, standing normally slightly ahead of the roll-back' I, which is operated by the inner knob. \Vhen the dog 25 is in the off position shown in Fig. 10, these hooked ends are spaced sufliciently from the roll-back 7 so that as the roll-back is moved it will not operate the slide 27. \Vhen, however, the dog 25- is turned into operative position, the hooks 29 will move back and rest close to the roll-back 7, so that the mere act of turning the inside knob 8 will cause one end or the other of the roll-back 7 to engage one of the hooked extensions 29, thereby pushing the slide 27 ahead and instantly releasing. the dog 25, so that the continued movementof the roll-back 7 will retract the latch. It thus becomes apparent that, even though the thumb-turn has been turned to dead-lock the latch slide, absolutely preventing its retraction from the outside of ,the outer knob, the door can still be opened from the inside by merely turning the inner knob.

Obviously means should be provided to guard against the possibility of dead-locking the latch in its extended position by the thumb-turn when the door stands ajar, because if at such time the latch should be held extending, the door could not be closed, and if the door were slammed it would result in injury to the lock. To that end I provide an automatic locking means c0- acting with the thumb-controlled latch deadlocking means which prevents the turning of the same from the unlocked to the deadlocked position. ferred form, is also operated by the pivoted operator 19, and so long as the pivoted operator 19 is extended, as is the case when the door is ajar, it will hold out a locking detent pin 30, the said detent pin being guided in the frame 1, the forward end taking into a locking notch 31 in the slide 27. This locking position is plainly seen in Fig. 3, and, as shown therein, the rear end of the pin 30 will be seen to be supported upon a shoulder 32 on the tail piece 33 of the operator 19, when the latter is extended. When, however, the operator 19 is pushed back, as by the strike-plate, when the door is closed, this shoulder 32 moves away from the rear end of the pin 30, thus This means, in its prefreeing the same. When 'the inis free, the slide 27 maybe actuated. hen, however, the pin 30'is held extended, as in Fig. 3, the slide" 27 canfiot -be moved and consequently the thumb-turn 23 cannot be rotated to dead-lock the latch. 34: is a beveled incline at the rear end'of the tail of the Irame 27, which leads toward the locking notch 31, so that the detent pin 30 may be given slight movement under certain conditions, for example, so that the pin may be pushed out when the shoulder 32 does not button 35 will stand behind the same.

is an indicator button, which is arranged to be carried in suitable socket guide 36 carried by the frame 1. This indicator button is designed to be located on the outer side of the door, and is so associated with the operating mechanism that when the door is dead-locked by the thumb-turn 23, said stand in an indicating position whereby any one on the outside may know that the door has been locked from within. Such an indicator button as shown in former Patent No. 936,231, dated October 5th, 1909, may be successfully employed. In that case, as in the present case, the indicator button is arranged in line with the thumb-turn spindle 24 and may be shifted to the indicating and non-indicating position, and vice versa, by the mere turning of the spindle 24.

What I claim is:

1. In a lock, a spring latch bolt, a knob adapted to the inner side of a door to which the lock is applied, and means of connection between said knob and latch whereby the turning of the former will retract the latter, with a dogging device for said latch likewiseoperable from the inner side of the door, and means of connection between said dogging device and said knob whereby the turning of the knob will first cast off said dogging device and then retract the latch, with auton'iatically operable means to predogging position when a door to which the lock is applied stands ajarw 2. In a lock, a spring latch bolt, a knob adapted to the inner side of a door to which the lock is applied, and means of connection between said knob and latch whereby the turning of the former will retract the latter, with a dogging device for said latch likewise operable from the inner side of the door, and means of connection between said dogging device and said knob whereby the turning of the knob will first cast ofi said dogging device and then retract the latch, with automatically operable means to prevent moving the doggingdevice to the latch dogging position when a door to which the lock is applied stands ajar, and an automatic latch dogging device or stop arranged to prevent the repression of the latch by pressure upon the exposed part thereof whenever a door to which the lock is applied is closed.

3. In a lock, a spring latch bolt, a knob adapted to the inner side of a door to which the lock is applied, and means of connection between said knob and latch whereby the turning of the former will retract the latter, with a dogging device for said latch likewise operable from the inner side of the door, and means of connection between said dogging device and said knob whereby the turning of the knob will first castoif said dogging device and then retract the latch, with automatically operable means to prevent moving the dogging device to the latch dogging position when a door to which the lock is applied stands ajar, and an externally located indicating device operable by the manually operable latch dogging device.

AUGUST ARENS. Witnesses:

RAYMOND K. BROOKS, CLAYTON A. BARKER. 

